From owner-freebsd-current Mon Feb 20 18:23:28 1995 Return-Path: current-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.9/8.6.6) id SAA17745 for current-outgoing; Mon, 20 Feb 1995 18:23:28 -0800 Received: from gndrsh.aac.dev.com (gndrsh.aac.dev.com [198.145.92.241]) by freefall.cdrom.com (8.6.9/8.6.6) with ESMTP id SAA17723 for ; Mon, 20 Feb 1995 18:23:24 -0800 Received: (from rgrimes@localhost) by gndrsh.aac.dev.com (8.6.8/8.6.6) id SAA20630; Mon, 20 Feb 1995 18:22:33 -0800 From: "Rodney W. Grimes" Message-Id: <199502210222.SAA20630@gndrsh.aac.dev.com> Subject: Re: newfs: sectors per cylinder (4096) disagrees with disk label (36) To: phk@ref.tfs.com (Poul-Henning Kamp) Date: Mon, 20 Feb 1995 18:22:32 -0800 (PST) Cc: current@FreeBSD.org In-Reply-To: <199502210154.RAA20970@ref.tfs.com> from "Poul-Henning Kamp" at Feb 20, 95 05:54:14 pm X-Mailer: ELM [version 2.4 PL23] Content-Type: text Content-Length: 641 Sender: current-owner@FreeBSD.org Precedence: bulk > > > This is caused by phk's changes to the behavior of newfs, it now > > uses 1 head/cylinder, 4096 sectors/track by default. This was an > > attempt to increase performace. I have found that it does nothing > > for any disks I use and just leads to problems while newfsing several > > of them. > How did you measure this ? Iozone using auto and 128 8192 and dd to/from /dev/{null,zero}. Note that the newfs code already defeats the rotational delay stuff by -n 1 -d 0 defaults. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Custom computers for FreeBSD